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MELSEC-Q
12 CONTROL SUB FUNCTIONS
12.6 Absolute position system
The QD75MH can construct an absolute position system by installing the absolute
position system and connecting it through SSCNET
.
The following describes precautions when constructing the absolute position system.
Servomotor
Servo amplifier
Position command
Control command
Servo parameter
QD75MH
Monitor data
PLC
CPU
OPR
address
M
PLG
Absolute position detector
Back-up
Return of the
p
resent value
Battery
Position command
Control command
Servo parameter
Monitor data
Fig. 12.33 Configuration of absolute position system
[1] Setting for absolute positions
When constructing an absolute position system, use a servomotor with absolute
position detector.
It is also necessary to install a battery for retaining the location of the OPR in the
servo amplifier. When an absolute position detector is installed, the "
Pr.103
Absolute position detection system" is selected "1: Valid" in the amplifier setting
for the servo parameters (basic setting).
Axis No. Axis 1 Axis 2 Axis 3 Axis 4
Buffer memory 30103 30303 30503 30703